ITEM NAME:20pcs Deep V Groove Roller Guide Wire Pulley Rail Track Ball Bearing 3x12x4mm 20pcs Deep V Groove Guide Wire Line Pulley Rail Track Ball Bearing 3x12x4mm SPECIFICATIONS.(Item included: 20 x V groove ball bearings. 2) Suitable for processing ordinary steel, iron, steel mold. Low load applications (ordinary precision). Note: the item is coated with a layer of grease to protect them from getting rusty.
